Before you begin: You need access to following
types of information:
- System messages
- SVC dump
- Job log
- TSO/E user's ISPF transaction log or session manager log
- System log
- Logrec data set
- z/OS® Resource Measurement Facility™ (RMF™), SMF, or other system monitoring programs, such as IBM® OMEGAMON® z/OS Management Console.
When diagnosing a performance problems, using Predictive Failure Analysis (PFA) and Runtime Diagnostics can help you eliminate whether the problem is a damaged job or system. See Runtime Diagnostics and Predictive Failure Analysis overview and installation.
RMF also provides comprehensive guidance for diagnosing performance problems. Diagnosing a problem: the first steps in z/OS RMF User's Guide offers a practical, task-oriented approach to analyzing performance issues using RMF.
Use the following flowchart to guide you through diagnosing a performance
problem:
Figure 1. Flowchart for performance problem
analysis
Use the following steps to guide you through diagnosing a performance
problem: